Soliman, Mohamed A., Hanem El Gendy, and Saber El Hanbally. “Effects of Calf Thymus Extract and L-Carnitine on Immunity and Growth Performance of Broiler Chickens”. International Journal of Scientific Reports 6, no. 2 (January 24, 2020): 45–52. Accessed November 13, 2025. https://www.sci-rep.com/index.php/scirep/article/view/652.